Steal MSL stuff from sms and fdlibm

include/libc/errno.h

@@ -1,4 +1,8 @@
 #ifndef _ERRNO_H_
 #define _ERRNO_H_
 
+#define ERANGE 32
+
+extern int errno;
+
 #endif

include/libc/limits.h

@@ -19,4 +19,6 @@
 #define LONG_MAX 2147483647
 #define ULONG_MAX 4294967295
 
+#define DBL_MANT_DIG 53
+
 #endif

include/libc/stdio.h

@@ -7,27 +7,7 @@
 extern "C" {
 #endif
 
-typedef struct
-{
-    int unk0;
-    unsigned short unk4b0:7;
-    unsigned short unk4b7:3;
-    unsigned short unk4b10:2;
-    unsigned short unk4b12:1;
-    unsigned char filler6[0x14-0x6];
-    int unk14;
-    int unk18;
-    int unk1C;
-    int unk20;
-    int unk24;
-    int unk28;
-    unsigned char filler2C[0x30-0x2C];
-    int unk30;
-    unsigned char filler34[0x3C-0x34];
-    int (*unk3C)();
-    unsigned char filler40[4];
-    int unk44;
-} FILE;
+#include "MSL_C/ansi_files.h"
 
 int puts(const char *s);
 int printf(const char *, ...);